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New exercises from Khan Academy 2020-08-11T16:35:27.000000
Updated: 1 hour 5 min ago

### Second derivatives (implicit equations)

Mon, 2020-07-20 12:08
Find second derivatives of functions that are defined through an implicit equation.

### Multiplication and division word problems

Mon, 2020-07-20 01:07
Practice solving multiplication and division word problems. Some problems have remainders.

Mon, 2020-07-20 01:01

### Generating random numbers

Sun, 2020-07-19 21:03
Practice using random numbers for programs written in the AP CSP pseudocode, in this set of free practice questions designed for AP Computer Science Principles students.

### Translation

Fri, 2020-07-17 23:09

### Regulation of gene expression and cell specialization

Fri, 2020-07-17 23:09
Test your knowledge of regulation of gene expression and cell specialization!

### DNA and RNA structure

Fri, 2020-07-17 22:11
Test your knowledge of DNA and RNA structure!

### Subtract 10s and 100s (no regrouping)

Fri, 2020-07-17 17:51
Practice subtracting 1, 10, or 100 from a number.

### Add 10s and 100s (no regrouping)

Fri, 2020-07-17 17:36
Practice solving problems like 344+20 and 344+200.

### Justification using second derivative

Thu, 2020-07-16 18:17
Justify properties of functions based on their second (and first) derivatives.

### Add and subtract within 20 word problems

Thu, 2020-07-16 14:01
Practice solving word problems by finding how many more (or fewer) objects there are. Numbers used are 20 or less.

### Break apart 3-digit addition problems

Thu, 2020-07-16 13:59
Practice breaking apart big addition problems using place value. For example, 234+567 is the same as 200+500+30+60+4+7.

Wed, 2020-07-15 23:22

### Animation 101

Wed, 2020-07-15 23:22
Prove that you've successfully animated a bouncing ball.

### Particle collisions

Wed, 2020-07-15 23:22
Test your understanding of how to simulate the collision of two particles.

### Two dimensional noise

Wed, 2020-07-15 23:22
Understand how two dimensional noise is created

### The cell membrane

Wed, 2020-07-15 20:35
Test your knowledge on the cell membrane!

### Crossing the Line: reading informational text; Performance-Enhancing Drugs in Sports 8

Wed, 2020-07-15 14:24
8th grade reading comprehension practice using a pair of informational texts on performance-enhancing drugs

### Crossing the Line: reading creative fiction; The Race Official

Wed, 2020-07-15 00:33