What are the assessment tools commonly used in Chinese classroom teaching in primary schools 5

Ruler, triangular ruler, compass, semicircle,

Electronic scales, rod scales, pound scales, case scales, table scales, physical balances, pallet balances, kilogram scales.

A tool commonly used in daily life to measure quality, the construction of a pallet balance.

Balance 1Physical balance: weighing range 0 1000g graduation value Occasions of use General weighing (experimental chemistry, general physics experiments called medicine).

2.Analytical Balance: Weighing Range 0 10g Graduation Value Occasions Precise weighing (analytical chemistry and pharmaceutical).

A mass spectrometer can be used to weigh the mass of a particle, and the indexing value is extremely small. The principle is that the electrostatic force is balanced with the magnetic force (Lorentz force).

The rod is used in the case of ordinary traders buying and selling, and the measurement accuracy requirements are not strict, the accuracy is plus or minus, and the measurement range is kilograms.

Electronic scales, used in ordinary trading, measurement accuracy requirements are more stringent, the accuracy is in plus or minus grams, and the measurement range is hundreds of tons.

Taiwan scales, used in ordinary trading, measurement accuracy requirements are more stringent, accuracy in plus or minus grams can generally be used to scale hundreds of kilograms of things.

Commonly used tools for measuring length are: vernier calipers, scale rulers, tape measures, spiral micrometers, etc.

Balances, scales, rod scales, electronic scales.

In the laboratory: tray balances, student balances.

In life, there are: rod scales, portable scales, electronic scales, platform scales, etc.

I searched on the Internet, I don't know if it's what you want:

1. Teachers should write the words they teach. The number of words and phrases copied should be controlled, each word should not exceed 3 times at a time, and the total number of words copied at a time in the lower grades should not exceed 60; Do not copy more than 90 at a time in the middle grades, and no more than 120 at a time in the upper grades.

2. Read each intensive reading text less than 3 times or 20 minutes in class, and read each skimming text less than 2 times or 10 minutes in class.

3. The written practice time of each class should not be less than 8 minutes in the lower section, no less than 6 minutes in the middle section, and no less than 5 minutes in the upper section.

4. For intensive reading texts, teachers should read the whole text; For skimming texts, the teacher should read them partially.

5. When reading and analyzing, teachers should have boards that reflect teaching ideas.

6. The number of students involved in class questions should not be less than one-third of the total class size, and the same student should not ask more than 3 questions in a class.

7. The image and sound in the courseware should be controlled as much as possible, and each lesson should not exceed 8 minutes in the low section, and not more than 5 minutes in the middle and high sections.

8. Teachers should do all the required homework assigned to students for cognition and comprehension.

9. There should be no less than 8 large essays in class each semester; 1-2 times a week must be arranged to practice writing in class.

10. Teachers should not go into the water less than 3 times per semester to practice composition.

11. Essay questions should be considered 3 days in advance, and at least 5 similar topics should be selected when proposing.

12. Composition guidance should generally have two aspects: what to write and how to write. The time for essay guidance can be controlled to about 20 minutes, and it should not be too short or too long.

13. Each essay in class must be corrected and graded (or graded).

14. Each big essay must have a class time to comment, and the composition time and comment time should be within two weeks.

16. Each semester should collect a booklet (or e-anthology) of excellent assignments of the class.

Start with words, words, and sentences.

Serial number, name, use, precision.

1 Manual three-coordinate measurement coordinate size, general linear size 2 Projector intersection structure size, general linear size.

3. Precision micrometer measures linear, dimensional, diameter, etc.

4 calipers intersect structural dimensions, generally linear dimensions.

5 Radius gauge Measure the radius of the workpiece.

6 needle gauge sample diameter, gap, etc.

7 gauge object height, clearance.

8 Electronic scale weighs the sample.

9 Feeler gauge for detecting deformation gaps.

10 Dental gauge Measure the thickness of throat teeth, worms, screws, etc.

11 Automatic CMM Measure coordinate size, shape and position tolerance, spatial intersection structure, spherical shape, tolerance zone, surface, etc.

12 Gear Engagement Machine Measure gear bonding 2-8 grades.

13 Tool Microscope Measure coordinate dimensions, general linear dimensions14 Hardness tester Measure mold steel, part hardness HRC15 Roughness Tester Measure sample mold roughness.

16 Roundness Meter Measure roundness, concentricity, and full runout.

17 two-dimensional"Measure the coordinate size, the general linear size, and the graphic output of the measured sample is 2D"

18 Reader Sample Reading.

19 Altimeter Measure mold parts, height, depth, etc.

The 20 dial gauge measures height, flatness, perpendicularity, etc.

21 Push-pull force gauge for sample strength requirements.

22 Auxiliary fixtures Product measuring fixtures, forming fixtures.

23 Common tools Blades, saw blades, common stationery.

1. Straightness and flatness measurement tools, common ones include ruler, flat ruler, flat crystal, level, autocollimator, etc.

2. Surface roughness measurement tools, such as surface roughness samples, light cutting microscopes, interference microscopes and surface roughness measuring instruments, etc.

3. Roundness and cylindricity measurement tools, including roundness meter, cylindricity measuring instrument, etc. During the measurement, the DUT is concentrically mounted with a precision shafting with an inductive length sensor or table for precise circular movement. It consists of a sensor, amplifier, filter, and output device of the instrument.

If the instrument is equipped with a computer, the computer is also included in the system.

4. Gear measuring tools, common ones are gear comprehensive inspection instrument, involute measuring instrument, circumference measuring instrument, lead instrument, etc.

5. Special measuring tools: only suitable for measuring the size, surface roughness, shape and position error of a specific workpiece. The common ones are automatic inspection machines, automatic sorting machines, single-size and multi-size inspection devices, etc.

Length Measurement Tool: A tool that compares the measured length with a known length to derive a measurement result.

Length measurement: meter ruler, vernier caliper, tape measure, outer micrometer time measurement: stopwatch, ordinary clock, electronic watch.

Current measurement: ammeter, multimeter, electric pen.

Weight measurement: bench scales, electronic scales, weighbridges, balances.

Temperature measurement: thermometer.

All kinds of professional measuring tools: such as theodolite, level, total station, GPS measuring instrument used in building construction. There are also some computer calculations and induction measurements, which are more commonly used in laboratories, so I won't talk about them here.

Meter ruler, vernier caliper, micrometer.

Classification of characteristics of chemical analysis and testing instruments Chemical analysis and testing instruments are divided into chemical composition analysis instruments, physical and chemical characteristics testing instruments and structural characteristics testing instruments according to the measured objects; According to the principle of the instrument, it can be divided into optical analysis instruments, chromatography analysis instruments, electrochemical analysis instruments, physical analysis instruments, etc.; In addition, according to the complexity and value of the instrument, it can be divided into conventional analytical instruments and large.