Class 3 investigated air resistance.  They ran up and down the hall with sheets of paper to feel the air resistance as they moved.  Next they completed an investigation into spinners and what effected the rate of fall.  Finally, they tried to make a balloon more aerodynamic by designing cones or wings to make it fly down a string as far as possible. The all enjoyed the activities and learnt about a fair test and variables.  Well done Class 3.