Classrooms should be safe havens. They are places of learning, discovery and newfound knowledge. The good ones embody other values too - inclusion, equality between students and the right to access education free of discrimination. But quietly at the end of last year the Department for Education moved to change all that. Without consultation, let alone a debate in the House of Commons, it demanded schools record the nationality and birthplace of every child.
There is a lot happening in Europe also during this 100 days. Britain is beginning the formal process of Brexit and the Dutch will hold elections which could herald the next step in the transatlantic populist march. And of course, the French will gear up for their own election in which the National Front will be the focus of much attention. It is an extraordinary time on both sides of the Atlantic. This exceptional moment demands examination and analysis. So the BBC is launching 100 Days, a daily programme that gives us the chance to look at these global shifts.
The Women's March wasn't - in the end - all about one man. It was about mothers, sisters, daughters - and yes - husbands, brothers and sons too, whole families turning out to prove that they care about the future, and they want it to be the best it can be.
When people pick up the bill at a restaurant I want them to clock the disabled access and loo, then tell everyone about it. I am optimistic that many, when choosing where to buy their lunch, will settle on the sandwich chain which a map, or possibly an app, says has committed to providing disabled access in all its outlets. By enabling consumers to make these choices we will speed up the pace of change.
It is irrational to take at face value the reassurance that these systems are safe and reliable today. It is even more so that they will remain so into the future. If our government is to take these risks, which are unavoidable when deploying these systems, it has to be far more honest about those risks and more open with those affected by them.
Our march does not end once the placards are downed: we need to build stronger and more cohesive communities, and change the standard of our political discourse at dinner tables, on WhatsApp and in shops and town halls around the world. Not only to challenge inequality, but to include people who otherwise could be susceptible to the easy answers of hate.
I'll be marching on Saturday because the first rule of making a change is to do something about it. I'll be marching to encourage all the people who have looked at the world lately and thought: "Someone should really do something about this" - to believe that on Saturday that person can be them.
If you're troubled by Trump, or bovvered by Brexit, I have good news for you: there is something far, far more serious for you to be worrying about. Last year was the hottest year on record. So was the year before. And the year before that. Sixteen of the seventeen hottest years on record have been since the beginning of this century.
If the Prime Minister truly wants us to be a global outward looking country, she needs to look at the global impact the continued uncertainty over Kashmir's future is having and encourage all sides to resume talks. We cannot continue to champion our freedoms here at home whilst allowing them to be deprived to people abroad.
In an unprecedented move that will change trade, export and international relations as we know it, the Prime Minister has confirmed that the United Kingdom will be leaving the European single market and the EU Customs Union upon full withdrawal from the European Union in 2019.
Theresa May will be left to 'dependably get on with the job at hand' free from considered objections and legitimate concerns to decisions that will affect us all. Our futures are being gambled on with little more than a cursory look and we will have only ourselves to blame if we are left with rubble after the smokescreen clears.