Circle:

• Parts of a circle
• Circles: calculate area, circumference, radius, and diameter 
• Circles: word problems
• Circle graphs
• Circle graphs_2
• Bar Graphs
• Bar Graphs_2_practice

Rational Numbers:

• Numbers
• Number Line-theory; practise
• Rational Numbers
• Absolute Value - theory; practise1, practise2
• Put rational numbers in order - practise
• Apply properties of operations to add and subtract rational numbers:
• Adding two positive or two negative integers on a number line
• Adding positive and negative integers on a number line

Understand subtraction as adding the additive inverse - video, practise