I like to have models to follow, and your lesson gives the following model: Rappeler + à + person being reminded + [infinitive]
Yet your quiz question "She reminds us to take our jackets"
is given the correct answer "Elle nous rappele de prendre nos vestes"
The model suggests that 'à' is a necessary part of the correct grammer but here it would be marked as wrong. I am disappointed and confused by the lesson that offers a clear model that is not correct.