Substitute - in algebraic expression

Substitute - in algebraic expression provides a virtually limitless supply of questions to let students DO math.

Intended for classroom use but also suitable for individual work.
Questions can be repeated as often as needed - the numbers are random.
The list of questions is color coded to show the degree of difficulty. The question difficulties range over several grades.
Those students that need to can start with easier questions. Those who finish quickly can move on to more challenging ones.
The teacher and student chose where to work. They can go back or skip forward, at any time, to get questions that are appropriate.
There are tutorial screens - intended for revision.
Every question has an example screen showing a worked example, but with different numbers. The question selection list is updated to show how many times each question has been correct answered, so both teacher and student can monitor progress.
Substitute generates the question and marks the answer, leaving the teacher free to work one-to-one with individuals or groups of students.
The questions are carefully graded from easy up to difficult in easy steps.

The activities include:

Given the value of the variables, evaluate an expression

Simple expressions like:
x + 7
11 − x
5x
18/x
a + 4b
...
4a × 3b − 4ac

Brackets:
a(b + c)
(x + 7)(x + 6)
...
4(1 − 7x)/(x + 5)

Exponents:
x²
4x²
(2x)²
x²(x −1)²
...
2(5x²)²/5x³

Nested brackets:
4((a − (b − c))
...
c −(b −(a − (b c)))

Useful for practicing many algebra skills
Substitute is a very easy to use and user friendly app that helps both teachers and students in the learning process

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