To make the ranch dressing, whisk together 1/3 cup mayonnaise with 1/4 cup milk (more or less depending on the consistency you want) with 1 Tbsp of the homemade ranch dressing seasoning mix. Season with salt, to taste. Use immediately and can refrigerate for up to 3 days. Makes about 4 Tbsp worth of mix.
Homestead High School is a four-year public high school located in Mequon, Wisconsin, a northern suburb of Milwaukee. Part of the Mequon-Thiensville School District, it serves a 48-square-mile (120 km2) area including the city of Mequon and the village of Thiensville.
If your son's school in La Paz has no links with any schools in France, you could always check with individual schools in France yourself, though this may take time. Public schools in France can be found from the website www.education.gouv.fr, however I would be surprised if a public school would take a child for 1-2 months with no exchange programme in place. Perhaps private schools might.